- All sections
- C - Chemistry; metallurgy
- C23C - Coating metallic material; coating material with metallic material; surface treatment of metallic material by diffusion into the surface, by chemical conversion or substitution; coating by vacuum evaporation, by sputtering, by ion implantation or by chemical vapour deposition, in general
- C23C 28/04 - Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of main groups , or by combinations of methods provided for in subclasses and only coatings of inorganic non-metallic material
Patent holdings for IPC class C23C 28/04
Total number of patents in this class: 1439
10-year publication summary
108
|
99
|
118
|
176
|
150
|
147
|
123
|
115
|
75
|
26
|
2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
Owner |
All patents
|
This class
|
---|---|---|
Oerlikon Surface Solutions AG, Pfaffikon | 556 |
70 |
Rtx Corporation | 8674 |
44 |
Walter AG | 240 |
43 |
Tungaloy Corporation | 481 |
42 |
General Electric Company | 18133 |
41 |
Applied Materials, Inc. | 16587 |
38 |
Sumitomo Electric Hardmetal Corp. | 969 |
37 |
Kennametal Inc. | 1380 |
32 |
AB Sandvik Coromant | 175 |
30 |
Kyocera Corporation | 12735 |
29 |
Sandvik Intellectual Property AB | 1634 |
29 |
Mitsubishi Materials Corporation | 2378 |
28 |
Siemens AG | 24990 |
27 |
Nippon Steel Corporation | 5649 |
22 |
Federal-Mogul Burscheid GmbH | 284 |
21 |
Rolls-Royce Corporation | 1686 |
19 |
JFE Steel Corporation | 6067 |
15 |
Korloy Inc. | 249 |
14 |
OSG Corporation | 355 |
14 |
SECO Tools AB | 456 |
14 |
Other owners | 830 |